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PowerNV is the platform using the OPAL [1] firmware on OpenPOWER systems. OPAL first loads a kernel and an initramfs image based on buildroot including a second boot loader petitboot [2]. The latter does device discovery and kexecs a new Linux image from disk or network. QEMU implements PowerNV machines [3] for the POWER8, POWER9 and Power10 processors which are used for dev and tests. POWER8 images being compatible with POWER9 and Power10, simply add a single qemu_ppc64le_powernv8 board for all. The QEMU script boots directly from a nvme disk because it is simple enough but a real system would boot from a ramfs first. [1] https://github.com/open-power/skiboot/blob/master/doc/overview.rst [2] https://github.com/open-power/petitboot/ [3] https://qemu.readthedocs.io/en/latest/system/ppc/powernv.html Signed-off-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches